Crusher for cinders and the like



1949- T F. J. STRAUB 2,479,523

' CRUSHER FOR CINDERS AND THE LIKE Filed April 4, 1946 2 Sheets-Sheet l WITNESSES: INVENTOR ATTORNEY Aug. 16, 1949. 1

F. J. STRAUB CRUSHER FOR CINDERS AND LIKE 2 Sheets-Sheet 2 Filed April 4, 1946 INVENTOR Fen/vars J. $772905.

WITNESSES:

WM ATTORNEY Patented Aug. 16, 1949 UNITED STATES PATENT OFFICE 2,479,523 CRUSHER FOR CINDERS AND THE LIKE Francis J. Straub, New Kensington, Pa.

Application April 4, 1946, Serial No. 659,587

6 Claims.

This invention is an improvement in crushers for reducing any suitable material, as cinders or the like, to a desired size for use inthe manufacture of building blocks, or for any other purpose.

The present invention is an improvement in that class of machines disclosed in my prior patent No. 1,509,005, and has a number of useful and advantageous improvements, as the result of considerable and extended experience with similar apparatus.

One such, is in connection with the crushing of wet or damp cinders, where frequently there is a tendency for the raw material to adhere to and form a so-called carpeting on the rolls. In such cases the wet material cannot be treated properly, will not pass freely through the rolls, and frequent stoppage for cleaning is necessary.

A further obstacle is the incidental inclusion of clinkers or other hard bodies or objects in the raw material, tending to clog and interfere with its passage outwardly through and beyond the rolls. Extended experience with such machines has developed the result that if the usual intervening so-called saddle or shoe is given an independent up and down movement, the agitation of the material, together with frequent opening and closing of the clearance passages at each side, with accompanying impacts, is of considerable advantage and tends to obviate these and other difficulties.

In my improvement I provide means for imparting such positive upward and downward movement to the saddle, thus assisting the operation materially in tending to more positively and evenly crush the cinders, and especially the harder particles thereof as clinkers, and tending to produce a more satisfactory and regular output.

In the old type of machine the saddle was capable of being depressed directly against springs by the pasage of hard lumps, or of foreign substances such as metal, brick fragments etc. Such operation however resulted in excessive wear on the rolls and possible breakage, due to such unusual strains.

I have discovered also that by imparting to the saddle a continuous alternating up and down movement, and of different ways of so doing, such treatment tends to greatly assist and improve the operation and output.

In the accompanying drawings showing-various means of so operating the crusher:

Fig. 1 is a sectional transverse view showing a pair of rolls and the intervening'saddle, with means for so actuating the saddle.

Fig. 2 is a transverse part sectional plan view on the line IIII of Fi 1.

Fig. 3 is a view similar to Fig. 1 illustrating a modified construction as to the actuating mechanism.

Fig. 4 is a similar view showing the saddle in its lowermost depressed position.

Fig. 5 is a further partial similar view illustrating a modified arrangement of the actuating means, for alternating the thrust of same.

In the drawings, the rolls A and B are of the usual type used in such machines, mounted in suitable bearings, and having conventional adjusting and drivin means. Below and between the rolls is the saddle I having the concave faces 8 as heretofore, for conforming generally to the contour of the rolls themselves, as in Fig. 1.

The saddle is secured to a suitable cross member, as a channel 9, extending midway across between the opposite side members H1, Ill. The frame is also connected with cross members H, H, at opposite ends, or the frame may be otherwise suitably designed to provide a suitable support for the saddle and other connected elements.

It is designed that the machine as thus or otherwise made, shall be supported, as by depending bolts l2, carried by suitable brackets l3 with ample foundation supports, whereby the weight of the frame is resiliently carried in normal position. As shown, the frame is mounted resiliently by spiral springs l4 around the bolts, capable of having their tension variably adjusted, as by nuts l5.

Suitable means are provided for alternately depressing the main frame 9|0-H against the opposing resiliency of the springs, for which purpose I utilize eccentrics or cams l6. These are carried by shafts I! in suitable bearings l8 on the frame, and driven by any usual means, as driving belts 19-20 and pulleys 2| and 22. It will be understood also that a single eccentric may be used, positioned midway of the frame properly designed to provide for such location, or for two such eccentrics.

While the saddle I may be varied in construction, it is preferable to terminate the concave faces 8 as shown, so as to provide a flat terminal top 23. Such flat surface assists in the way of a primary interference of the material and its partial accumulation, tending to more equally distribute the raw material to each side.

As thus constructed, as in Figs. 1 and 2, the eccentrics working together, effect an alternating downward motion of the frame and saddle, with spring action return of the frame and saddle, at any desired speed, depending upon the control of the driving means.

In such operation the intervening spaces between the rolls and the saddle surfaces are alternately widened and narrowed, together with a forcible abrupt upward return movement. Such action tends to more successfully crush hardened pieces of clinker, slag, etc., while at the same time assisting in maintaining the surfaces of the rolls clean and active.

Another advantage also may be secured by varying the application of the downward pressure, as illustrated in Fig. 3.

In such arrangement the eccentric or eccentrics are located at one side only of the roll and saddle assembly, and if desired, with somewhat different spring cushion supports as shown. In

cidentally, it is desirable to vary the strength'of the spring or springs at opposite ends of the machine, and to utilize a Weaker resistance at one side of the rolls when the opposite end porti'll only of the frame isa'ctuat'ed downwardly, with spring return, as in Fig. 3. It is also of advantage to locate the eccentri or other cam emitter-stat enten'ded distance beyond the rolls, whereby to maintain the separation movement lii ndesiredlimitsin assisting the operation.

onal incidentto such arrangement is that, shown in Fig. 4, when one end only of the frame islowered, there is a slight variation in the'c'ohcave surfaces of the saddle with relati to each roll respectively, tending to slightly w nthe space at one side more than at the n It will be obs erved. also, that the saddle 1 of Figs, 3 and 4 utilizes concave curvatures of larger rad'ius'tliar' 'tliat of the radius of the rolls, such durvaturesbeingdrawn from centers offset from the roll centers, resulting "in a wider entrance space wlie nthelsaddle is erected, tapering toward the" oht letatbpposite edges of the saddle.

In such constructiomand arrangement, with the"more"or'"le 's's rapid ahd'constant vertical movement of the saddle, the circulation spaces are alternately widened and narrowed, together with the accompanyingsom'ewhat severe upward thrust?Suchactiohassists in crushing and disintegration of. the raw material.

A further modification of the invention is illustrated. in Fig."5,'where'the eccentrics, as shown, may be'so mountedv oin theirdrive shafts, as at say 90 difierence in annular location, more or es s. es r d- In such arrangement, the main frameis thus subjectedlto analternating see-saw motion, giving a, correspondin alternating actuation to the saddle, tending to assist in regular and effective crushing of the cinders atbothsides equally.

It, will be understoodthat the contour of the saddle may be variedas to its faces with relation to 'th'o se'of the rolls, or otherwise, depending uponfthe character, of the material or other controlling incidents of the treatment of the raw materialbeing crushed.

ll .Af'cru's her as described comprising a pair. of rolls andjan intervening saddle, and means" for imparting constant afndjreg'ula'r movement to the sa ddleftowards and from the rolls consisting of fined "supporting brackets, a. lower supporting frame for thesaddle, Verticallydpndirig bolts eicte jding' through h kets. cushioning springs aroundthe bolts, and means for depressingjth e frame in opp osition''to. lifting. action of mean V v '2; In combination with a pairofrolls, a, co operating saddle, a supporting'fraine' therefor;

means for resiliently supporting the frame, posi-- tively driven eccentric means for lowering the frame and saddle with alternating reverse action of same, and supporting means for the frame consisting of upper supporting brackets, frame supporting bolts extending through the brackets and frame, and cushioning springs around the bolts tending to urge the, frame upwardly in opposition to lowering action of" the eccentric means.

3. In combination with a pair of rolls, a cooperating saddle, a supporting frame therefor, resilient means supporting the frame and saddle in uppermostposition, and resisting and lowering means consisting of a constantly driven eccentricehgagi-ng the saddle support and acting in opposition to such resilient means, said resilient means comprising a series of upper brackets and supporting bolts extending through said brackets admir frame and having surrounding springs exerting constant upward pressure on the frame. 44. In a crushin machine for cinders and the like, a, pair. of spaced apart rolls, a lower sup- .5 the frame, meansfor depressing the frame in opposlitionv to its resilient support in alternating downward and upward movements, a saddle on theframe midway between the rolls and below the crushing space thereof, such saddle having a' middle flat'surface between oppositely cone cavedfacesadapted-to assume varying upwardly and downwardly alternating positions with relatipn to, the roll surfaces as the frame and saddle are actuatedbythe depressing means and opposing resilient means. i

5. In acrushing machine for cinders and the like, a pair of spaced apart rolls, a lower supporting frame, means for resiliently supporting the frame, means for depressing the frame in opposition to. its resilient support in alternating downwardand upward movements, a saddle on the frame midway between the rolls and below the crushing space, thereof, such saddle having a middle flat surface between oppositely concaved faces, adapted to assume varying upwardly anddownwardly alternating positions with relation. to the roll surfaces as the frame and saddle are actuated by the depressing means and opposing resilient means, the. oppositely concaved faces, of the saddle being non-concentric with relation to the curvature of the rolls.

6. In a crushing machine for cinders and the like, a. pair-10f spacedapart rolls, a lower supporting frame, meansfor resiliently supporting the, frame, means for depressing the frame in oppositionto .its resilient support in alternating downward andfupward. movements, a saddle on the, framemidway betweentherolls and below the crushing space thereof, such saddle having a. middle flat, surface between oppositely concavediaccsfldapted toassume varying upwardly and downwardly alternating. positions with relation to the roll surfaces as the frame and saddle are actuated by the depressing means and 0pposing resilient means, the oppositely concaved faces of'the saddle being non-concentric with relation to the curvature of the rolls whereby to provide gradually narrowing outlet spaces for crushed product. between the rolls and the corn caved faces of the saddle at varying alternating positionsof the saddle.

FRANCIS J. STRAUB.

(References on following page) REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 5 Number Name Date 248,292 Crandall Oct. 18, 1881 254,974 Hollingsworth Mar. 14, 1882 691,582 Beam Jan. 21, 1902 10 Number 6 Name Date Liggett June 4, 1918 Straub v Sept. 16, 1924 MacLachlan et a1. Dec. 2, 1924 Turucz Oct. 6, 1931 Beaumont Mar. 1, 1932 Dillon June 17, 1941 Kiesskalt et a1. Nov. 4, 1941 

